question

isopropyl (rubbing) alcohol

answer

2-propanol/2-hydroxypropane

question

ethylene glycol

answer

1,2-ethandiol/ 1,2-dihydroxyethane

question

gylcerol

answer

1,2,3-propantriol /1,2,3-trihydroxypropane

question

formaldehyde

answer

methanal/ carbonylmethane

question

acetone

answer

2-propanone/ 2-carbonylpropane

question

acetic acid

answer

ethanoic acid/ carboxylethane

question

molecules that have O-H,N-H or H-F bonds

answer

can form hydrogen bonds with themselves and with water

question

molecules that have O, N or F atoms

answer

they can accept hydrogen bonds from water, even though they cannot form hydrogen bonds with themselves

question

compare boiling points of molecules that can form hydrogen bonds with themselves and molecules that cannot hydrogen bonds with themselves

answer

molecules that can form hydrogen bonds with themselves have a higher boiling point than similar molecules that cannot hydrogen bonds with themselves

question

compare boiling points of alcohols and alkane, which has a higher boiling point?

answer

alcohols can form hydrogen bonds, but alkanes cannot - so alcohols have a higher boiling point than alkanes

question

compare solubility of molecules that can form hydrogen bonds with themselves and molecules that cannot hydrogen bonds with themselves

answer

molecules that can form hydrogen bonds with themselves are usually soluble in water

question

are alcohols soluble in water

answer

many alcohols are soluble in water because they can form hydrogen bonds in water

question

compare boiling points of polar and non-polar molecules

answer

polar molecules usually have a higher boiling point than non-polar molecules

question

compare boiling points of polar molecules that can form hydrogen bonds and polar molecules that cannot form hydrogen bonds

answer

polar molecules that can form hydrogen bonds have an even higher boiling point than polar molecules that cannot form hydrogen bonds

question

compare polarity of *octanol* and *ethanol*

answer

octanol is less polar than ethanol. polar molecules with a large non-polar hydrocarbon part (more carbons) are less polar than polar molecules with a smaller hydrocarbon part (less carbons)

question

compare solubility of *octanol* and *ethanol*

answer

octanol is less soluble in water than ethanol. polar molecules with a large non-polar hydrocarbon part (more carbons) are less soluble than polar molecules with a smaller hydrocarbon part (less carbons)

question

compare dispersion forces of a large and smaller molecule

answer

a large molecule has stronger dispersion forces than a smaller molecule

question

compare dispersion forces of hexane and ethane

answer

hexane (larger molecule) has stronger dispersion forces than ethane (smaller) - because larger molecule has stronger forces

question

compare boiling point of hexane and ethane

answer

hexane has higher boiling point than ethane. a molecule with greater number of carbon atoms usually has a higher boiling point than the same type of molecule with less number of carbons.

question

which of the following compounds are polar and which are non-polar: propane, heptane, 1-propanol, 1-heptanol

answer

polar: 1-propanol,1-heptanol = because they contain O-H bond which is very polar non-polar: propane, heptane = don't contain O-H bond

question

compare propane and heptane; which has stronger dispersion forces

answer

heptane has stronger dispersion forces than propane- because a larger molecule that contains more carbon atoms has stronger dispersion forces than one with fewer carbon atoms

question

compare propane and heptane; which has higher boiling point

answer

heptane has higher boiling point than propane- because a larger molecule that contains more carbon atoms has higher boiling point than one with fewer carbon atoms

question

compare 1-propanol, 1-heptanol; which is more polar

answer

1-propanol is more polar than 1-heptanol - because molecules with large hydrocarbon part, the alkyl group's non-polar nature becomes more important than the polar O-H bond - so the smaller molecule are more polar than large molecules

question

compare 1-propanol, 1-heptanol; which is more soluble

answer

1-propanol is more soluble than 1-heptanol - because solubility decreases as the number of carbon atoms increases - so the smaller the molecule the higher the solubility

question

which compound has higher solubility: a polar or non-polar compound

answer

polar compound; because it contains less carbon atoms which means greater solubility

question

which compound has higher solubility: a compound that can form hydrogen bonds or a compound that cannot form hydrogen bonds

answer

a compound that can form hydrogen bonds are usually soluble in water

question

which compound has higher solubility: propanol or pentanol

answer

propanol has higher solubility pentanol - because less carbons in propanol - less carbons - greater solubility

question

which compound has stronger attractions between molecules: polar or non-polar compound

answer

non-polar compound has more carbons - stronger attraction between molecules

question

which compound has stronger attractions between molecules: compound without O-H or N-H bonds or compound with O-H or N-H bonds

answer

compound with O-H or N-H bonds has stronger attractions - its a larger molecule than without bonds therefore stronger attractions

question

which compound has higher boiling point: polar compound without O-H or N-H bonds or polar compound with O-H or N-H bonds

answer

polar compound with O-H or N-H bonds - trend: polar molecules that form hydrogen bonds have higher BP than polar molecules that cannot form bonds

question

which compound has higher boiling point: pentanol or propanol

answer

pentanol - more carbons - higher BP

question

structural isomer

answer

2 compounds that contain same number of each atom but in different arrangement

question

geometric isomer

answer

2 compounds that are identical exceptfor the arrangments of groups across a double bond

question

cis isomer

answer

2 largest groups are on the same side as the DB

question

trans isomer

answer

2 largest groups are on the different sides as the DB

Organic Chem Quiz 1 Expecations – Flashcards

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